Let me clear up my echnique a little bit. The way I do the throw for iriminage is that lets say my rightarm is under uke's chin and I am pushing up. I would then throw him in front of me. I feel a lot of power in the direction. However I have been told by my sensei and another student that I should throw him off center and to the right direction. When I watch sensei do it though, I see him do it the same way I did it and I feel no power when throwing the latter way either.